21809928

素因数分解:

$2^3\times 3^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{991}}^1$

素因数の和:1138

約数の個数: 64

約数和(自身を含む): 62853120

約数和(自身を除く): 41043192

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84, 131, 168, 262, 393, 524, 786, 917, 991, 1048, 1572, 1834, 1982, 2751, 2973, 3144, 3668, 3964, 5502, 5946, 6937, 7336, 7928, 11004, 11892, 13874, 20811, 22008, 23784, 27748, 41622, 55496, 83244, 129821, 166488, 259642, 389463, 519284, 778926, 908747, 1038568, 1557852, 1817494, 2726241, 3115704, 3634988, 5452482, 7269976, 10904964, 21809928]

約数ペア:

[(1, 21809928), (2, 10904964), (3, 7269976), (4, 5452482), (6, 3634988), (7, 3115704), (8, 2726241), (12, 1817494), (14, 1557852), (21, 1038568), (24, 908747), (28, 778926), (42, 519284), (56, 389463), (84, 259642), (131, 166488), (168, 129821), (262, 83244), (393, 55496), (524, 41622), (786, 27748), (917, 23784), (991, 22008), (1048, 20811), (1572, 13874), (1834, 11892), (1982, 11004), (2751, 7928), (2973, 7336), (3144, 6937), (3668, 5946), (3964, 5502)]